Diagnosis diagram
Remarks
Related info
Here is the diagram for diagnosing and fixing one of the most popular issues with any Phantom 3 quadcopter. The solution will also work fine for other DJI drones (though dome diagnosis steps are not applicable for non-Phantoms).
The diagram is oriented towards users who do not have a second drone to interchange parts, or advanced equipment. The use of such items is delayed in the graph as much as possible, though it is unavoidable at some point. A repair shop would use different approach, testing components by replacing them with known good ones as one of first steps.
ESC Status Error Service Diagram:
I never finished this one. But what is there should be enough to fix basic problems and give some hints for the tougher ones.
Links to more info below.
Detailed explanation of retrieving the /MISC/LOG/P3?_FW_LOG_AB.txt:
What is and how to get LOG_AB file
Explanation of how to read with understanding each line of the LOG_AB file:
How to read the P3X fw update log file
Description of firmware modules, which chip they program and which board they're on: o-gs/dji-firmware-tools Wiki: Dji Firmwares
Board descriptions, useful for component level repairs: o-gs/dji-firmware-tools Wiki: Dji Hardware
That concludes the service info. Hopefully you now have working motors on your Phantom drone.